Hello and welcome to the forum MissViv, so glad you decided to stop lurking and join us.
As to your question about having 2 kittens at the same time, having done this myself before I can highly recommend it.
My first Ragdoll, Cody, I got just one male kitten as I already had two rescue females who after slow introductions accepted him into the family which was really nice.
However, after 4 years I thought I'd get another male Ragdoll and got my boy Fosco aka Fozzy and after a month got his littermate sister Katy (the breeder was intending to keep her for himself) and they grew up together and it was such a joy to watch them play, sleep, eat, well do everything together.
Tragically I lost my Fozzy to FIP last November and my remaining rescue girl I had in March of this year after a procedure, so I have decided the time was right to get another kitten now, but only one this time around.
Please do keep us posted, we would love to get to know you better and hear what you decide to do.